UIPickerView won't scroll on a custom UIView

I've got a custom class that conforms to UIView. It contains a UIPickerView and UIButton. I'm using the following code:

class ColorPickerView: UIView {    // MARK: - Subviews    private lazy var colorPicker: UIPickerView = {        let picker = UIPickerView()        picker.translatesAutoresizingMaskIntoConstraints = false        picker.dataSource = self        picker.delegate = self        picker.isHidden = false        return picker    }()    private lazy var colorSave: UIButton = {        let button = UIButton(type: .system)        button.setTitle("Save", for: .normal)        button.translatesAutoresizingMaskIntoConstraints = false        button.isHidden = false        button.backgroundColor = .black        button.addTarget(self, action: #selector(didTapColorSave), for: .touchUpInside)        return button    }()    // MARK: - Lifecycle    init() {        super.init(frame: .zero)        addSubviews()        setupConstraints()    }    required init(coder aDecoder: NSCoder) {        fatalError("init(coder:) has not been implemented")    }    // MARK: - Actions    @IBAction func didTapColorSave(sender: AnyObject) {        hideUI()    }    // MARK: - Private    private func addSubviews() {        self.isUserInteractionEnabled = false        addSubview(colorSave)        addSubview(colorPicker)    }    private func setupConstraints() {        NSLayoutConstraint.activate([            colorSave.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 16),            colorSave.topAnchor.constraint(equalTo: bottomAnchor, constant: -64),            colorSave.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -16),            colorSave.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -16),            colorPicker.leadingAnchor.constraint(equalTo: leadingAnchor),            colorPicker.topAnchor.constraint(equalTo: bottomAnchor, constant: -256),            colorPicker.trailingAnchor.constraint(equalTo: trailingAnchor),            colorPicker.bottomAnchor.constraint(equalTo: colorSave.topAnchor, constant: -16)        ])    }    private func hideUI() {        colorPicker.isHidden = true        colorSave.isHidden = true    }}extension ColorPickerView: UIPickerViewDataSource, UIPickerViewDelegate {    func numberOfComponents(in pickerView: UIPickerView) -> Int {        return 1    }    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int{        return customColor.allValues.count    }    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {        print(customColor.allValues[row].rawValue)        return customColor.allValues[row].rawValue    }}

UIPickerView is used to chose a color from an enum customColor. Then all elements can be hidden using colorSave button.

Yet once I'm putting an instance of ColorPickerView class, it's shown correctly but does not scroll. What am I doing wrong? Does it have smth to do with isUserInteractionEnabled?